Armature winding head assembly



Jan. 14, U MS I 2,414,218

ARMATURE WINDING HEAD ASSEMBLY Filed Jan. 10, 1945 4 sheets -sheat 1 3mm Ra Zpb Hbrams Jan. 14, 1947. ABRAMS I 2,414,218

ARMATURE WINDING HEAD ASSEMBLY Filed Jan. 10, 1945 4 Sheets-Sheet 2 3mm Ra Z p]: Abrams Jan. 14, 1947. R ABRAMS 2,414,218

ARMAT URE WINDING HEAD ASSEMBLY Filed Jan. 10, 1945 4 Sheets-Sheet 4 25 Y V V gwue/wto'v Ralph Hbrams Patented Jan. 14, 194? UNITED STATES PATENT OFFICE ARMATURE WINDING HEAD ASSEMBLY Ralph Abrams, Fresno, Calif. Application January 10, 1945, Serial No. 572,138

14 Claims. 1

This invention is directed to improvements in armature Winding machines, and in particular the invention is directed to, and it is an object to provide, a novel armature winding head assembly.

A further object of the invention is to provide an improved armature winding head assembly which is especially designed for winding armatures wherein the individual coils are wound between corresponding armature slots disposed less than 180 apart; i. e., armatures whose coils have a short span, as used for example in multipolar motors.

An additional object of the invention is to provide an armature winding head assembly, as in th preceding paragraph, which is operative, upon rotation of said armature supporting head assembly, to oscillate the armature about its axis to an extent and with such timing as to dispose each of said corresponding slots in the same position for reception of wire from the feeder, even though said corresponding slots bear a relation to each other of less than 180 apart circum ferentially of the armature.

Another object of the present invention is to provide an armature winding head assembly which comprises a pair of spaced, armature supporting heads mounted for rotation about the same axis and having arcuate, segmental jaws on adjacent ends thereof disposed in facing relation and concentric to another axis at a right angle to the axis of said heads, the armature being en gaged between said jaws for rotation about its and said other axis in common, means to continuously rotate the head assembly, and other means operative upon rotation of said head assembly to oscillate the armature so as to alternately position corresponding armature slots, which are spaced apart less than 180, in the same position for wire reception from a feeder.

An additional object of the invention is to provide an armature winding head assembly, as in the preceding paragraph, in which said jaws are mounted on corresponding heads for limited rotation about the jaw axis; there being a cam mechanism, operative upon one-way rotation of the heads, to oscillate said jaws and consequently the supported armature to the extent necessary.

A further object of the invention is to produce a simple and inexpensive device, and yet one which will be exceedingly effective for the purpose for which it is designed.

These objects are accomplished by means of such structure and relative arrangement of parts as will fully appear by a perusal of the iollowing specification and claims.

In the drawings similar characters of reference indicate corresponding parts in the several views:

Figure 1 is a side elevation of the device in use, with one of a corresponding pair of armature slots in wire receivingposition.

Figure 2 is a similar view, but shows the opposite side of the device and the armature oscillated to position the other slot of said pair in wire receiving position.

Figure 3 is a sectional plan view of the device.

Figure 4. is a cross section on line A-fl of Fig. 3.

Figure 5 is a cross section on line 5-5 of Fig. 3.

Figure 6 is a fragmentary diagrammatic elevation showing one of the cam pins about to be engaged and moved by the corresponding cam roller.

Referring now more particularly to the charactors of reference on the drawings, the armature winding head assembly which is the subject of the present invention may be used in connection with any armature winding machine having a shaft, here indicated at 1, adapted to be driven continuously in one direction during the winding of any given coil of the armature; an armature winding machine of this type being shown in my copending application for U. S. Letters Patent, Serial No. 571,177, filed January 3, 1945.

' Th armature winding head assembly comprises a pair of complementary heads 2 and3 disposed in spaced-apart relation and in axial alinement; the head 2 being fixed on the outer end of shaft 1, while the head 3 includes a supporting trunnion 4 turnably mounted in a sleeve 5. The sleeve 5 is axially adjustabl in a fixed upstanding bracket 6, and said sleeve is normally held against axial movement by a set screw 7 threaded through the bracket and seating against said sleeve.

The heads 2 and 3 are formed, on adjacent ends, with arcuate faces 8 and 9, respectively, having a common axis iii disposed at right angles to and intersecting the axis ll of the rotatable heads 2 and 3. At said ends the heads 2 and 3 support arcuate segmental jaws l2 and I3, respectively, which matchingly and slidably coopcrate with the faces 8 and 9; the jaws I2 and I3 are secured to the heads 2 and 3 for limited rotary motion, about their common axis in, by means of arcuate slots M in which headed screws it ride. The armature to be wound, which, is indicated generally at It, is adapted to be engaged between the jaws l2 and I3, and said. jaws each include a locating rib R which engages in an adiacent one of the slots l I of the armature, whereby the two jaws l2 and 13, together with said armature, are held in a unitary non-rotatable relation in the head assembly, with the armature axis common to the axis it of said jaws. Rotation of said unit about the axis It is limited by a stop l8 which projects radially from the back of the jaw I2 into an arcuate channel 19 formed in the head 2; said stop abutting at opposite ends of its length of travel against adjustable stop screws 20 threaded into opposite ends of channel 19, said screws being accessible from exteriorly of the head for adjustment. When the stop 18, moving in one direction, abuts against the corresponding screw 26, further motion of the body l2 in such direction, together with the armature l6 and jaw I3, is prevented.

The above armature winding head assembly is particularly adapted for use in winding shortspan coils on armatures for multipolar motors or the like, and wherein each coil is wound between corresponding armature slots I! which are spaced apart circumferentially of the armature less than 180, as are shown for example at .A and B.-

To wind a short span armature coil between the armature slots A and B, it is necessary that the armature slot A be positioned in wire-receiw ing relation to the working face 2| during onehalf turn of each revolution of the head assembly, and that the slot B be positioned in wire receiving relation to the working face 22 during the other half turn of each revolution of the head assembly; this being accomplished automatically as the head assembly rotates, by oscillating the armature to a predetermined extent, and which extent is limited by adjustment of the stop screws 23. The slots A and B are thus each in correct wire-receiving position when the working faces 2| and 22, respectively, together with guide fins 23, turn into wire-guiding relation to the wire 24 as fed from the feeder.

The armature I6 is automatically oscillated as aboveby means of the following operating mechanism:

A cross shaft 25 is journaled in the head 2 in parallel relationship to the axis It, and in intersecting relation to the axis ll; said cross shaft being fitted at opposite ends with pinions, indicated at 26 and 21; the pinions 25 and 27 meshing with segmental gears 28 and 29 formed on corresponding end portions of the rotary jaw l2. It will be seen that with oscillating movement of the cross shaft 25, a corresponding movement is imparted to the jaw i 2 and the armature, and said cross shaft is oscillated at the times and in the directions necessary to produce the desired result, in the following manner:

Atrthe ends thereof the cross shaft 25 projects beyond the adjacent pinions and at each such end is fitted with a collar, said collars being indicated at 3!) and 3!. The collars 3B and SI are are disposed in circumferentially spaced relation to each other, the spacing being such that when one pin engages and is moved by the roller 35, the armature is rotated through a half oscillation in one direction to position the slot A in wire-receiving relation to the working face 2!, and when the other pin engages said roller the armature is rotated through a half oscillation in the opposite direction to position the slot B in wire receiving relation to the working face 22. Thus, with continuous rotation of the head 2 in the same direction, the armature IE is oscillated back and forth, whereby the f ed wire 24 is successively and recurringly fed into the slots A and B to form a short-span armature coil extending therebetween,

It will be recognized that the number of slots which the coil spans can b varied by changing the relative positions of the collars 30 and 3! on the cross shaft 25. Q

After any given coil has been wound on the armature between corresponding slots, the shaft i is stopped and the set screw 1 released so that the head 3 may 'be drawn away from the armature sufficient to permit the latter to be released from jaws l2 and I3 and rotated relative thereto circumferentially adjustably secured to the cross shaft by means of set screws 32. Each of the collars includes an outwardly projecting boss through which a, cam pin is adjustably threaded substantially tangentially of the corresponding collar, saidpins being indicated at 34 and 35. The pins project to a termination at their outer ends some distance from the corresponding boss 33 and are adapted, upon rotation of the head assembly, to successively and recurringly engage with a cam roller 36 fixed in connection with a pport 31 to one side of the head assembly. The collars 30 and 3| are set so that the pins 3 a d to position for winding the next coil, which will be wound in a different pair of slots in said armature.

While the head assembly is described as used to Wind 2. single coil at a time, two coils can be simultaneously wound; one coil winding in cooperation with the head 2, and the other coil winding in cooperation with the head 3, in which latter event the head 3' will be shaped similar to head 2 to accomplish proper wire guiding.

From the foregoing description it will be readily seen that I have produced such a device as substantially fulfills the objects of the invention as set forth herein.

While this specification sets forth in detail the present and preferred construction of 'the device, still in practice such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention, as defined by the appended claims.

Having thus described the invention, the'following is claimed as new and useful and upon which Letters Patent is desired: a

1. An armature winding head assembly for winding armature coils, each of which spans between corresponding slots spaced apart circumferentially in the armature less than the assembly comprising a pair of axially alined heads mounted in spaced relation for rotation about-a common axis, means on said heads adapted to support an armature therebetween with the armature axis at right angles to said common axis, and for independent oscillation of said armature about its axis, drive meansoperativeto rotate said heads, and means to oscillate the armature about its axis in timed relation to rotation of the heads suficient to successively and recurringly dispose each of said corresponding'slots at a predetermined and like wire receiving point.

2. An armature winding head assembly for winding armature coils, each of which spans between corresponding slots spaced apart circumferentially in the armature less than 180, the assembly comprising a pair of axially alined heads mounted in spaced relation for rotation about a common axis, means on said heads adapted to support an armature therebetween with the .armature axis at right angles to said common axis, and for independent oscillation of said armature about its axis, drive means operative to rotate said heads, and means to oscillate the armature about its axis in timed relation to rotation of the heads sufiicient to successively and recurringly dispose each of said corresponding slots at a predetermined and like wire receiving point; one of said heads being mounted for axial adjustment whereby to permit the retraction of said one head from an armature supporting position, to release said armature supporting means.

3. An armature winding head assembly for winding armature coils, each of which spans between corresponding slots spaced apart circumferentially in the armature less than 180, the assembly comprising a pair of axially alined heads mounted in spaced relation for rotation about a common axis, means on said heads adapted to support an armature therebetween with the armature axis at right angles to said common axis, and for independent oscillation of said armature about its axis, drive means operative to rotate said heads, and means to oscillate the armature about its axis in timed relation to rotation of the heads sufiicient to successively and recurringly dispose each of said corresponding slots at a predetermined and like wire receiving point; one of said heads including separate wire guiding faces on opposite sides of the axis of said head in position to cooperate with a corresponding one of said slots when the latter is disposed at said wire receiving point.

4. An armature winding head assembly for winding armature coils, each of which spans between corresponding slots spaced apart circumferentially in the armature less than 180, the assembly comprising a pair of axially alined heads mounted in spaced relation for rotation about a common axis, means on said heads adapted to support an armature therebetween with the armature axis at right angles to said common axis, and for independent oscillation of said armature about its axis, drive means operative to rotate said heads, and means to oscillate the armature about its axis in timed relation to rotation of the heads sufficient to successively and recurringly dispose each of said corresponding slots at a predetermined and like wire receiving point; said armature supporting means including arcuate, segmental jaws mounted in spaced, facing relation on the heads, said jaws being concentric to the armature axis.

5. An armature winding head assembly for winding armature coils, each of which spans between corresponding slots spaced apart circumferentially in the armature less than 180, the

assembly comprising a pair of axially alined heads mounted in spaced relation for rotation about a common axis, means on said heads adapted to support an armature therebetween with the armature axis at right angles to said common axis, and for independent oscillation of said armature about its axis, drive means operative to rotate said heads, and means to oscillate the armature about its axis in timed relation to rotation of the heads suiiicient to successively and recurringly dispose each of said corresponding slots at a predetermined and like wire receiving point; said armature supporting means including arcuate, segmental jaws mounted in spaced, facing relation on the heads, said jaws being concentric to the armature axis and mounted for limited rotation thereabout, and releasable means between the jaws and armature arranged to prevent relative rotation therebetween.

6. A device as in claim 5 in which said armature oscillating means is operatively connected to one of said rotatably mounted jaws.

7. A device as in claim 5 in which said armature oscillating means includes a segmental gear on one of said jaws, a pinion journaled on the corresponding head, and instrumentalities operative to oscillate said pinion upon rotation of the heads.

8. A device as in claim 5 in which said armature oscillating means includes a segmental gear on one of said jaws, a pinion J'Ollrnaled 0n the corresponding head, and instrumentalities operative to oscillate said pinion upon rotation of the heads, said instrumentalities including a cross shaft on the head, the pinion being fixed on the shaft, a pair of cam elements fixed in longitudinally spaced relation on the shaft and projecting therefrom in circumferentially spaced relation, and a fixed cam positioned to successively and recurringly engage said cam elements to oscillate the shaft and pinion.

9. An armature winding head assembly for winding armature coils, each of which spans between corresponding slots spaced apart circumferentially in the armature less than 180, the assembly comprising a pair of axially alined heads mounted in spaced relation for rotation about a common axis, arcuate segmental jaws mounted on adjacent ends of the heads in spaced, facing relation for engagement of the armature therebetween, said jaws being concentric to the armature axis and mounted for limited rotation thereabout, releasable means between the jaws and armature to prevent relative rotation 'therebetween, means to drive one of said heads, and means to oscillate one of said jaws in timed relation to rotation of said head sufilcient to suc cessively and recurringly dispose each of said slots at a predetermined and like wire receiving point.

10. An armature winding head assembly for winding armature coils, each of which spans between corresponding siots spaced apart circumferentially in the armature less than 180, the assembly comprising a pair of axially alined heads mounted in spaced relation for rotation about a common axis, arcuate segmental jaws mounted on adjacent ends of the heads in spaced, facing relation for engagement of the armature therebetween, said jaws being concentric to the armature axis and mounted for limited rotation thereabout, releasable means between the jaws and armature to prevent relative rotation therebetween, means to drive one of said heads, and means to oscillate one of said jaws in timed relation to rotation of said head suiiicient to succes-' sively and recurringly dispose each of said slots at a predetermined and like wire receiving point; said last named means comprising a cross shaft journaled on one head parallel to the armature axis, a pinion fixed on the shaft, a segmental gear on the corresponding jaw meshing with the pinion, the shaft projecting beyond opposite sides of said one head, cam elements projecting laterally from opposite ends of the shaft and in circumferentially spaced relation, and a fixed cam element mounted adjacent said one head and with which fixed cam element the shaft mounted cam elements successively and recurringly engage in shaft oscillating relation.

11. An armature winding head assembly for winding armature coils, each of which spans between corresponding slots spaced apart circumferentially in the armature less than 180", the

. assembly comprising a pair of axially alined heads mounted in spaced relation for rotation about a common axis, arcuate segmental jaws mounted on adjacent ends of the heads in spaced, facing relation for engagement of the armature therebetween, said jaws being concentric to the armature axis and mounted for limited rotation thereabout, releasable means between the jaws and armature to prevent relative rotation therebetween, means to drive one of said heads, and mean to oscillate one of said jaws in timed relation to rotation of said head sufficient to successively and recurringly dispose each of said slots at a predetermined and like wire receiving point; said rotation preventing means between the jaws and the armature comprising cross ribs on the jaws seating in adjacent armature slots.

12. An armature winding head assembly for winding armature coils, each of which spans between corresponding slots spaced apart circumferentially in the armature less than 180, the assembly comprising a pair of axially alined heads mounted in spaced relation for rotation about a common axis, arcuate segmental jaws mounted on adjacent ends of the heads in spaced, facing relation for engagement of the armature therebetween, said jaws being concentric to the armature axis and mounted for limited rotation thereabout, releasable means between the jaws and armature to prevent relative rotation therebetween, means to drive one of said heads, and means to oscillate one of said jaws in timed relation to rotation of said head sufficient to successively. and recurringly dispose each of said slots at a predetermined and like wire receiving point; said last named means including movable cam elements projecting from one head, and a fixed cam element adjacent the head, the movable cam elements successively and recurringly' engaging the fixed cam element with rotation of said one head and being arranged to thus produce oscillating motion, and means on said one head to transmit said motion to the corresponding jaw.

13. An armature winding head assembly for winding armature coils, each of which spans between corresponding slots spaced apart circumferentially in the armature less thanl", the assembly comprising a pair of axially alined heads mounted in spaced relation for rotation about a common axis, arcuate segmental jaws mounted on adjacent ends of the heads in spaced, facing relation for engagement of the armature there-, between, said jaws being concentric to the armature axis and mounted for limitedrotation thereabout, releasable means between the jaws and armature to prevent relative rotation therebe tween, means to drive one of said heads, and means to oscillate one of said jaws in timed relation to rotation of said head sufficient to successively and recurringly dispose each of said slots at a predetermined and like wire receiving point; the rotation of the jaws about the armature axis being limited by a stop formed on the back of one jaw, the corresponding head having a slot into which said stop projects andalong which slot said stop is movable, and stop screws threaded into said head and projecting into the slot at opposite ends, said screws being adjustable and accessible from exteriorly of said head. a

14. An armature winding head assembly comprising a pair of spaced, armature supporting heads mounted for rotation, about the same axis and having arcuate, segmental jaws on adjacent ends thereof disposed in facing relationand concentric to another axis at a right angle to the axis of said heads, the armature being engaged between said jaws for rotation about its and said other axis in common, means to continuously rotate the head assembly, and other means operative upon rotation of said head assembly to oscillate the armature so as to alternately position corresponding armature slots, which are spaced apart less than in the same position for wire reception from a feeder.

RALPH ABRAMS. 

